Idf was released as "expression specificity" by Karen Spärck Jones inside a 1972 paper. Even though it has worked well to be a heuristic, its theoretical foundations are already troublesome for at least 3 many years afterward, with a lot of scientists seeking to obtain information and facts theoretic justifications https://dantenkezr.blogproducer.com/45530400/the-smart-trick-of-supply-chain-disruptions-that-nobody-is-discussing